HR824 Monitors Rattling Cone Problem??

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Raydio

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Lately, the bass part (lower cone) of 1 of my monitors have been rattling very loosely. It makes a sound similar to a busted speaker in a car whenever its supposed to play bass. BUT If I lightly put my finger on the cone while the bass plays, then it wont rattle loosely and plays fine so Im sure the monitor isnt busted. Sometimes after a while it fixes itself after I place my finger on it, sometimes it doesnt.

Has anyone ever experienced this problem? If so, what do you think is causing the cone to rattle so loosely, especially when the monitor was never dropped. Thanks
 
look around the edges of the cone (if you can from the outside) to see if it's still sealed to the case. a lot of times an old, degraded or busted cone can fall apart along the edges allowing it to wobble.
 
I own a pair of 824s myelf, and I'll I gotta say that these things are built like battleships, it would normally take a hell of a lot to get these things to "break".

Benny is right to suggest you check the rim of the rigid cone where it meets the rubber suspension to see if there is any seperation there. The flexible suspension "O-ring" (I'm not sure what the actual technical term is for that part of the assembly) on the 824s is high-quality, heavy-duty material which I would think would be unlikely to dry out and go brittle like many would - unless maybe you have had the monitor placed in a location where it received direct sunlight often enough to let the UV eat away at it. My 824s are about 6 years old and the suspensions are as pliable and solid as day one. But is suppose it is possible that you have either a defective ring or perhaps that the glue connecting the ring to the cone has seperated someplace.

Another possibility is that there may be a problem with the voice coil assembly behind the cone. I'm purely speculating here, but there may be something back there causing the coil to temporarily separate from the driver or maybe causing it to "stick" (either physically or magnetically.)

Either way, there is no way that an 824 should be acting that way unless there is actually something "broken". You can drive these things like Steve McQuuen drives a Mustang and they don't even break a sweat (and I've accidentally popped the clutch on mine by accident a few times ;) ) I'd recommend taking it in for service, expecially if it's still under warranty.

G.
 
That would probably be the voice coil.

They are pretty hard to tear up unless you run some digital noise or loud pops or something through them. But more than likely, you may just be one of the unlucky ones to have a voice coil problem.


Malcolm
 
malcolm123 said:
That would probably be the voice coil.


Malcolm
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That would be my guess too. If it's not still under warranty, and they want an arm and a leg to replace, you can try to search for the driver online:

Vifa P22WP-01 some places used to sell them for about $30-$45, I know they were in limited supply though.
 
The rubber ring around the broken monitor is a little bit more worn out than the one that works but Im almost positive its something inside of the cone. Ive had my monitors for about 6 years as well so Im not under warranty. I dont know where in the Chicago area I can get service yet but I really need inexpensive service pronto. Any more suggestions?
 
If it doesn't scare you, pop that woofer out and look in the box. Something may have come loose.
 
another vote for voice coil

http://madisound.com/

raw replacement speakers, VERY helpful and they know thier stuff.
if you're brave enough, take the speaker out before you call, they'll want some numbers off of it.
 
giraffe said:
another vote for voice coil

http://madisound.com/

raw replacement speakers, VERY helpful and they know thier stuff.
if you're brave enough, take the speaker out before you call, they'll want some numbers off of it.
Click to expand...

Yeah give Larry at Madisound a call He's the head honcho there, I live about 3 miles away and get all my raw drivers though them, The Vifa P22WP is the model number but they of course are specially designed for Mackie by Vifa so Madisound probably wouldn't stock them.

Here are two places that used to carry them, you might want to get a hold of them and ask if they could get any more:

(scroll all the way to the bottom of this page)
http://www.usspeaker.com/6&8.htm

And

(not listed anymore but these guys used to carry them)
http://apexjr.com/
 
Weak or cracked surrounds (the rubber or foam that mounts the cone to the basket) will allow the cone to set off center and viberate against the voice coil producing a rattle, especialy at low frequencies. You might be able to remove the speakers and rotate them. If this dosen't help, it's replacement time.
 
Dani Pace said:
Weak or cracked surrounds (the rubber or foam that mounts the cone to the basket) will allow the cone to set off center and viberate against the voice coil producing a rattle, especialy at low frequencies. You might be able to remove the speakers and rotate them. If this dosen't help, it's replacement time.
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Sounds more like my problem. It only vibrates when big 808 sounds come in, other than that, the treble is fine. I wanted to just open it and check around the sides yesterday but I think I need an allen wrench or something to open the front panel because non of my screw drivers fit.
 
Oh yeah, and while we're on the subject.... how do I effectively open the HR824 monitor and what should I look for once its open. Thanks
 
I haven't opened the monitor yet but I have another big problem. Suddenly I cant any sound out of the woofer. My hi's work fine, but there is action from the woofer. Im aiming towards just replacing it. If you guys have any tips just post them. Thanks
 
Raydio said:
I haven't opened the monitor yet but I have another big problem. Suddenly I cant any sound out of the woofer. My hi's work fine, but there is action from the woofer. Im aiming towards just replacing it. If you guys have any tips just post them. Thanks
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If you meant to say there is *no* action from the woofer - which wiuld jive with the "no sound" - you may have finally blew a voice coil which was getting funky to begin with.

If you can find the replacement woofer (if not wholesale or aftermarket, maybe you cn get them fron Mackie if you ask nicely? :) ) replace it. If you have the budget, you might want to replace both woofs just so you hav two of them the same age and similar production runs. Though that's kind of a luxury option.

G.
 
SouthSIDE Glen said:
If you meant to say there is *no* action from the woofer - which wiuld jive with the "no sound" - you may have finally blew a voice coil which was getting funky to begin with.

If you can find the replacement woofer (if not wholesale or aftermarket, maybe you cn get them fron Mackie if you ask nicely? :) ) replace it. If you have the budget, you might want to replace both woofs just so you hav two of them the same age and similar production runs. Though that's kind of a luxury option.

G.
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Thanks for the reply. Im just catching hell trying to find a dealer that still carries the part. Most stores stopped selling them over a year ago & Mackie repair is kind of expensive. Any leads would be appreciated. Thanks guys
 
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